Viral Disease Patterns

Question 1

what is incubation period?

Answer 1

time period netwene viral exposure and onset of illness (symptoms becoming apparent

Question 2

describe different types if incubation periodss

Answer 2

Subacute sclerosing Panencephalitis measles - reare complication 2-6 years after infection. very long incubation

Question 3

what is Generation time?

Answer 3

gneration time- the time period between viral exposure and invidiaul become infectious to other-

generation time is shorter than incubation time and before the onset of illness

Question 4

what is R0?

Answer 4

Reproducitve number

the number of subsequent infections in a ssuceptible populations caused by a viral illness in one indivudal during its infective period

Rubella , measles, mumops all have very high R0

Question 5

acute infections disease pattern?

Question 6

what are sublincial infections (give example of one prominent)

Question 7

describe persistnet and chronic pattern of disease - give example?

Question 8

what are latent infections?

Answer 8

acute infection followed by a perisistne latent infeciton- virus lay dorment in host cell

Chicken pox—> shingles

HSV1- cold sores

Question 9

descirbe slow progressive disease pattern

Answer 9

virus repliates at normal rate- but disease takes many years to manifest itslef can be infective or non infective

SSPE- non infective complication of measles (subaciute sclerosing pancencphatit SSPE) - fatal

HIV 1- infectious

also Prion illness CJD (NOT virus)